Difference between JumpTo and JumpBy?

I want to know the difference between methods JumpTo and JumpBy of cocos2D? Wh开发者_如何学Pythonere can I use JumpTo and where JumpBy?

please Help.

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JumpTo will move the node to an exact point on the screen, but JumpBy moves by an offset relative to the current position of the node.

For example, lets say I have a sprite at point 30,30. If I use JumpTo and specify 10,10 as the point the sprite will end up at 10,10. If I use JumpBy and specify 10,10, the sprite will end up at 40,40.